[wip] Add FIXMEs for fmease

Author: fmease

compiler/rustc_parse/src/parser/path.rs

@@ -704,19 +704,22 @@ impl<'a> Parser<'a> {
                 if matches!(self.token.kind, token::Comma | token::Gt) {
                     err.span_suggestion(
                         self.psess.source_map().next_point(eq).to(before_next),
+                        // FIXME(fmease, associated_const_equality): Also mention assoc consts here if enabled.
                         "to constrain the associated type, add a type after `=`",
-                        " TheType",
+                        " /*Type*/",
                         Applicability::HasPlaceholders,
                     );
                     err.span_suggestion(
                         eq.to(before_next),
+                        // FIXME(fmease): Say "is meant to be a type argument"
                         format!("remove the `=` if `{ident}` is a type"),
                         "",
                         Applicability::MaybeIncorrect,
                     )
                 } else {
                     err.span_label(
                         self.token.span,
+                        // FIXME(fmease, associated_const_equality): Say "type or const expression" if enabled
                         format!("expected type, found {}", super::token_descr(&self.token)),
                     )
                 };

tests/ui/parser/recover/recover-assoc-eq-missing-term.stderr

@@ -6,8 +6,8 @@ LL |     bar::<Item =   >();
    |
 help: to constrain the associated type, add a type after `=`
    |
-LL |     bar::<Item = TheType>();
-   |                  +++++++
+LL |     bar::<Item = /*Type*/>();
+   |                  ++++++++
 help: remove the `=` if `Item` is a type
    |
 LL -     bar::<Item =   >();